Scientists working at a hydroelectric plant believe they have discovered a more efficient method of using water to produce electricity. The group that reviews and approves this new method should consist of which group of scientists?

A. only scientists with backgrounds are different from the group proposing the new method; they would be more open minded and less influenced by their prior experiences
B. only scientists with backgrounds are similar to the group reposing the new method; they would best understand the process and could promptly approve the new method
C. scientist severied background; they can question different aspects of the new method, which could lead to greater understanding or the need to reevaluate the new method
D. The background of the scientist is not important; science and scientific methods are universally accepted

Answer:

C, Diffusion

Explanation:

Sorry If I am wrong, Thanks for letting me answer

(P.S I am Probably right)

Answer:

valence electrons

Explanation:

Okay I will explain you friend...

To get pure alumina, you should follow these below steps.

Step (1):- Impurity alumina is treated with conc. NaOH solution to form sodium aluminate.

\({ \green{ \tt{Al2O3 + 2NaOH + 3H2O → 2Na[Al(OH)4]}}}\)

Step (2):- sodium aluminate is treated with carbon dioxide gas to form precipitated Al2O3

\({ \purple{ \tt{2Na[Al(OH)4] + CO2 → Al2O3.xH2O + NaHCO3}}}\)

Step (3):- Precipitated Al2O3 separated by filtration and heated at 1470K to give pure alumina.

\({ \blue{ \tt{Al2O3.xH2O \: \: —(1470K)→ Al2O3 + xH2O}}}\)

Answer:

The most stable resonance structure shown in fig (II).

Explanation:

Given that,

If oxygen is the central atom in the CON– ion

We know that,

Resonance :

The movement of electron is called resonance.

If the electronegativity is more of element then the element is more stable.

We need to find the most stable resonance structure

According to figure,

Electronegativity of N is more than C

So, N is the more stable in fig (II).

Hence, The most stable resonance structure shown in fig (II).

The most stable resonance structure is the resonance structure in which nitrogen has a formal charge of -2.

There are molecules and ions in which a single structure does not sufficiently explain the observed properties of the molecule or ion. In such cases, bonding can not be explained in terms of one single structure, the actual structure of the compound lies somewhere between many contributing structures.

For the ion CON–, the most stable resonance structure is the resonance structure in which the nitrogen atom which is more electronegative has a formal charge of -2 and less electronegative carbon has a formal charge of -1 as shown.

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Answer:

48.0g is the specific gravity of liquid sample with a mass of 35.0g and a volume of 14.00 mL

Answer:

Explanation:

There are 14 Crystal systems available

They are divided into three parts

Answer:

.4 moles

Explanation:

this is if it's 35 grams

9.77 litres of NO2 are generated on average.

The balanced equation for the breakdown of N2O5 is as follows:

\(2N_2O_5(g) -- > 4NO_2(g) + O_2(g)\)

determine how many moles of N2O5 decompose:

\(V(N_2O_5) / Vm = n(N_2O_5)(N_2O_5)\)

where V(N2O5) = 4.86 dm3 is N2O5's volume and Vm(N2O5) is N2O5's molar volume under the circumstances stated in the ideal gas law:

\((R*T)/P = Vm = V/n\)

when the gas constant R is used.

the kelvin scale of temperature, T

The pressure is P.

The ideal gas law:

\(n(N_2O_5) = V(N2O5) / Vm(N_2O_5) = 4.86 dm3 / (24.46 L/mol) = 0.1982 mol\)

the number of moles of NO2 is:

\(n(NO_2 = 4/2 * n(N_2O_5) = 0.3964 mol\)

then,

\(n(NO_2 = 4/2 * n(N_2O_5) = 0.3964 mol\)

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Answer: water

For many centuries, it was considered that there were only three states of matter: solid, liquid and gas (the three that are present and stable in our world). And water is the substance that best represents them, because it is the only one that exists naturally in the three states.

Explanation: Matter can exist in one of three main states: solid, liquid, or gas.

Solid matter is composed of tightly packed particles. ...

Liquid matter is made of more loosely packed particles. ...

Gaseous matter is composed of particles packed so loosely that it has neither a defined shape nor a defined volume.

Answer:

Water is the only common substance that is naturally found as a solid, liquid or gas. Solids, liquids and gases are known as states of matter.

Feel free to mark it as brainliest :D

Ignore this part unless you want to understand out of your syllabus:

However, if you take into account the fifth state of matter, Bose-Einstein Condensate, which has been recently discovered, there is no substance as such.

Answer:

-It is considered the modern atomic model.

-It describes the probable locations of the electrons

Explanation:

edge 2020

The correct answer is:

The electron cloud model is another name used to describe the modern wave mechanical model of the atom.

It is the atomic model introduced by Erwin Schrodinger in 1927 based on the principles of quantum mechanics. It was an advancement over the Bohr model of the atom.

In this model, the atomic orbital is described as a region in space where there is a high probability of finding an electron. Hence, the electron is not found in specific orbits according to the Bohr model, rather, we describe the probability of finding the electron. This is the contemporary approach to the study of atomic structure.

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Answer:

B

Explanation:

uncontrolled energy damage the body

Answer: causes destruction

Explanation:

According to Lechatliers principle, as the concentration  of HCl is decreasing, the reaction will shift to the reactant side to increase HCl, then the Keq decreases, since product concentration is decreases.

According to Lechatliers principle, when an any disorder imbalance the equilibrium of a reaction system, the system itself balances the factors and shifts to a new equilibrium.

If the concentration of any component is increased, then the reaction shifts to the direction in which it is consumed. If the concentration is decreased, the reaction shifts to the direction in which the component is produced.

Hence, as the HCl decreases, the reaction shifts to backwards direction to produce more HCl, then, concentration of reactants HCl and Mg increases, and that products and Keq decreases.

The reaction is an exothermic reaction. Hence, as the temperature is increased, the reaction shifts to the backward direction in which heat is used. Hence, reactant concentration increases, product concentration decreases, Keq also decreases.

If the temperature is reduced, the reaction shift to the forward direction. Hence, concentration of HCl, and Mg decreases but MgCl2 increases and Keq increases.

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Here BCl3 has 6 valence electrons, TiCl2+ has 19 valence electrons, GaCl4- has 36 valence electrons, IF5 has 42 valence electrons.

Hence GaCl4- and IF5 have more than 20 valence electrons.

Answer:

The answer for the following is None of the above

Explanation:

I. BCl3:

Boron has 3 valence electrons, and chlorine has 7 valence electrons.

Valence electrons in BCl3 = 3 (Boron) + 3 (Chlorine) = 6

II. TiCl2+:

Titanium (Ti) is in Group 4 of the periodic table and has 4 valence electrons. Chlorine (Cl) has 7 valence electrons.

Valence electrons in TiCl2+ = 4 (Titanium) + 2 (Chlorine) - 1 (positive charge) = 5

III. GaCl4-:

Gallium (Ga) is in Group 3 of the periodic table and has 3 valence electrons. Chlorine (Cl) has 7 valence electrons.

Valence electrons in GaCl4- = 3 (Gallium) + 4 (Chlorine) + 1 (negative charge) = 8

IV. IF5:

Iodine (I) is in Group 7 of the periodic table and has 7 valence electrons. Fluorine (F) has 7 valence electrons.

Valence electrons in IF5 = 7 (Iodine) + 5 (Fluorine) = 12

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Answer: Hello, the answer is; Thermal/heat energy is hotness, etc.

Explain: Thermal/heat energy is stoves, ovens, etc.

Thermal energy is sorta like the sun, the planet. Hot water could be considered thermal energy.

For more information about the definition of Thermal/heat energy, I would search up a slide on google.

Answer:

yes it is true

Explanation:

evaporation occurs when burning liquid water changes into gas.

Answer:

ESCALAS MAYORES (D, E, G, A, B) Porfavor necesito ayuda,te lo agradecería muchísimo!!

Es urgente

Reverse the sign of the second equation, change the sign of the enthalpy and add. Option B

The enthalpy could be obtained by the use of the Hess law of constant heat summation. As such, we have a number steps and it is possible for use to obtain the enthalpy of the final reaction as shown by a series of manipulations.

By inspection, we can see that, if we desire to obtain the enthalpy of the final reaction as shown, then we have to reverse the sign of the second equation, change the sign of the enthalpy and add. Option B

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The addition of hydrochloric acid to a reaction mixture can serve several purposes, depending on the specific reaction and its conditions such as: (1) To provide protons (H⁺), (2) To adjust the pH of the reaction mixture, (3) To remove impurities or byproducts.

(1) To provide protons (H⁺) for acid-catalyzed reactions: HCl is a strong acid, meaning it readily donates protons to other molecules. In some reactions, the presence of HCl can accelerate the reaction by increasing the concentration of protons in the reaction mixture. This can facilitate bond-breaking and bond-forming steps in the reaction mechanism.

(2) To adjust the pH of the reaction mixture: In some reactions, it may be necessary to maintain a specific pH range for the reaction to proceed optimally. By adding HCl, the pH of the reaction mixture can be lowered, making the environment more acidic. Conversely, the addition of a base such as sodium hydroxide (NaOH) can raise the pH of the reaction mixture.

(3) To remove impurities or byproducts: In some reactions, the addition of HCl can help to remove impurities or byproducts that may interfere with the desired reaction. For example, HCl can be used to remove metal oxides or hydroxides from a reaction mixture.

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Answer:

A tin atom and 2 molecules containing two hydrogen atoms bonded to one oxygen atom.

Explanation:

Equation of reaction:

SnO2 + 2H2 ---> Sn + 2H2O

According to Dalton's postulates:

1. All elements are made up of small indivisible particles called atoms

2. The atom cannot be created nor destroyed

3. The atoms of the same element are alike in every aspect and differ from atoms of all other elements

4. During a chemical reaction there is a combination of atoms in small whole numbers.

From the given options, the one that satisfies the postulates of Dalton is:

"A tin atom and 2 molecules containing two hydrogen atoms bonded to one oxygen atom"

This is because it gives a balanced chemical equation for the number of atoms reacting for each element is equal to the number of atoms of each element produced. This is in accordance with the postulate that atoms are neither created nor destroyed.

The three other postulates are also obeyed. The small whole number ratio for the reactants and products in the chemical reaction is 1 : 2 : 2.

1) A precipitate called \(Fe(OH)_{2}\)

2) A precipitate is formed called \(Mg(CH_{3} COO)_{2}\)

The term precipitate is used to describe the product that is formed when there is a reaction between two aqueous phase reactants that leads to the formation of a solid product from the reaction as we can see from the image that is attached.

we now have to look at the reactions as we can see them in the mage that is attached. We must note that we can only say that a precipitate has been formed if the product is solid after we have mixed the aqueous phase reactants.

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The  most probable values for the first four ionization energies of the aluminum are : IE₁ = 578 kJ/mol, IE₂ = 1817 kJ/mol, "IE₃ = 2745 kJ/mol", IE₄ = 11577 kJ/mol.

The ionization energy is the amount of the energy required to remove the electron from an atom. The electronic configuration of Al is given as :

Al electronic configuration = 1s² 2s² 2p⁶ 3s² 3p¹. The fourth ionization energy is comparatively high because the 2p subshell is fully filled and the energy required to remove the electron from the stable electronic configuration will be high. Therefore, the fourth ionization energy is high.

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Answer:

SI-28

Explanation:

Butyryl chloride reacts with Grignard reagent, methyl magnesium bromide, to form pentan-2-one. Pentan-2-one reacts with vinyl magnesium bromide to form the final product 3-methylhex-1-en-3-ol.

The following diagram illustrates how butyryl chloride becomes 3-methylhex-1-en-3-ol. conversion of 3-methylhex-1-en-3-ol from butyryl chloride. Tertiary alcohols are produced when carboxylic esters, R'CO2R, combine with two equivalents of an organolithium or Grignard reagent. Two identical alkyl groups are present in the tertiary alcohol (see R) A ketone intermediate is used to carry out the reaction, which is subsequently used to react with the second equivalent of the organometallic reagent. As we've just seen, the ketone undergoes further reactions to create a tertiary alcohol. This explains why, when reacting with esters, two equivalents of Grignard are required. a mechanism The Grignard performs an addition reaction on the ester in the first step, resulting in the formation of C-C and the breakdown of C-O (pi), giving us an intermediate with a negatively charged oxygen.

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Allylic carbanion has 4 electron, allylic radical has 3 and allylic carbocation has 2 electrons involved in delocalization.

Allylic carbanion are a common conjugated system. The allyl carbanion has the formula C3H5. This is derived from the substance propene by loss of a proton. An allylic radical is a resonance stabilized radical. In each of the two resonance forms of which the unpaired electron is on an allylic carbon. These radicals are more stable than alkyl radicals due to resonance effects  an unpaired electron can be delocalized over a system of conjugated pi bonds. The Allylic carbocations are the common conjugated system. The conjugated allyl carbocation is a hybrid of of the two resonance structure so the positive charge is delocalization over the two terminal carbons.

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Answer:

11 yes

12 H2O( water molecules)

13 3H2O( water molecules)

Explanation:

Sry, my phone's a potato, so I didn't read it properly, so I'm not sure about the question 11.

11-yes, they stay together, but they release 3 molecules of OH an H.

12- here it talks about what will happen with OH and H: they will be H2O (water molecules).

13- and here we end it with the informations that we got: 3 fatty acids+ glycerol---> fat+ 3H2O( the 3 H and 3 OH)

Answer: C

Explanation: hope this helps

The model of the solar system that is shown here is:

C. Geometric model

Model for description of earth and other entites

In astronomy, the geocentric model is a superseded description of the Universe with Earth at the center. Under the geocentric model, the Sun, Moon, stars, and planets all orbit Earth.

Characteristics:

Thus, option C is correct.

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